His technique is as brilliant as it is is unusual. A favourite song of mine is Liar, there Mustaine really shows that he is one of the best.
The riff is impossible to play (for me), and is very thrashy.
You cant help to wonder what would have happened if Mustine would have remained in Metallica? Would there have been a Black Album and all the shit that came after that or would Metallica remained the best thrash band in the world?

Who knows? But now we have Megadeth instead.